Abstract
In the process of N2 injection, the dissolution and diffusion of N2 into oil will change the physical properties of crude oil and enhance oil recovery. In this paper, two experimental procedures are investigated to measure phase behaviour and equilibrium features of crude oil and injected N2. The dynamic miscibility experiment was conducted to obtain N2-oil phase behaviour and physical property change data, while the static miscibility experiment was conducted to simulate the vapour/liquid equilibrium process features. The result of dynamic miscibility experiment showed that it is difficult to achieve miscible displacement for N2 injection due to the low solubility and low extraction capability of N2; however, the solution of N2 can reduce oil viscosity and IFT, and the high compressibility coefficient of N2 can implement the displacement energy to obtain higher oil producing rate. The static miscibility result indicated that N2 dissolved in crude oil through a contacting interface and then diffused in deeper part of oil, contacting time and equilibrium pressure are key influence parameters to vapour/liquid equilibrium features.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
